Originally Posted by rob999

since it is only one wrist, I assume it is a combination of less strength in that wrist and overall conditioning.

I know that when I started riding I had pain in both wrists, some of that was tweaking my fit, much of that is conditioning, my wrists were not used to the type of stress they were under, nor was my back used to doing it's thing etc...

You didn't mention how long you were on the bike, that will help us give more feedback.